(Updated) Anthropic Claude Sonnet is now available in Microsoft 365 Copilot [MC1247880]

(Updated) Anthropic Claude Sonnet is now available in Microsoft 365 Copilot [MC1247880]

Message ID: MC1247880 (Updated) Updated April 17, 2026: We have updated the content. Thank you for your patience. [Introduction] We’re expanding model choice in Microsoft 365 Copilot with the addition of Anthropic Claude Sonnet for users with a Microsoft 365 Copilot…
(Updated) Microsoft 365 Copilot: Navigation refresh in the M365 Copilot app [MC1187677]

(Updated) Microsoft 365 Copilot: Navigation refresh in the M365 Copilot app [MC1187677]

Message ID: MC1187677 (Updated) Updated April 17, 2026: We have updated the timeline. Thank you for your patience. [Introduction:] The Microsoft 365 Copilot app now features a simpler, cleaner navigation experience. We’ve flattened the menu and grouped features logically so it’s…
Exchange Online, SharePoint Online, and Microsoft Teams: April 2026 industry-wide DigiCert Global Root CA (G1) distrust [MC1282565]

Exchange Online, SharePoint Online, and Microsoft Teams: April 2026 industry-wide DigiCert Global Root CA (G1) distrust [MC1282565]

Message ID: MC1282565 [Introduction]To support industry-wide security improvements and modern cryptographic standards, browsers and platforms that follow Mozilla and Chrome trust stores will begin distrusting the DigiCert Global Root CA (G1) starting April 15, 2026. Microsoft has already migrated Microsoft 365 services…
Microsoft Purview eDiscovery: Naming and description fields will restrict certain special characters [MC1282562]

Microsoft Purview eDiscovery: Naming and description fields will restrict certain special characters [MC1282562]

Message ID: MC1282562 [Introduction]We’re making a change to the characters allowed in naming and description fields across Microsoft Purview eDiscovery. As part of ongoing security hardening efforts, this update strengthens input validation for eDiscovery cases, holds, searches, and review sets…
Message center post structure updates may require admin script changes [MC1282308]

Message center post structure updates may require admin script changes [MC1282308]

Message ID: MC1282308 (Updated) [Introduction:] We’re updating the Microsoft 365 Message center post structure to provide more consistent, concise, and actionable communications. This change standardizes section headings across Message center posts to improve readability, support automation scenarios, and enable future…